DATA TRANSMISSION SYSTEM AND METHOD, AND RELATED DEVICE

This application provides a data transmission system and method, and a related device. The system includes a plurality of nodes, and a plurality of accelerators in each node are connected to each other through a first communication link. A plurality of communication planes are constructed between accelerators in the plurality of nodes, each communication plane includes one accelerator in each node, accelerators on any two communication planes are different from each other, and accelerators on a same communication plane are connected to each other through a second communication link. A first accelerator in a first node obtains first data sent by another accelerator in the first node, and the first data includes data to be sent by the another accelerator in the first node to a second accelerator in a second node. Then, the first accelerator sends the first data to the second accelerator through the second communication link. Intra-node data exchange and inter-node data exchange are performed by using the foregoing method, so that a quantity of inter-node data exchanges can be reduced, data congestion and a transmission delay can be reduced, and data transmission efficiency can be improved.